Wrench



938- s. G. GREEN ET AL 2,128,244

v WRENCH Filed Sept. 20, 195'? Inventors Samuel G E1"EETL Ember: 11- Lennon Attorney Patented Aug. 30, 1938 UNITED STATES PATENT OFFICE WRENCH Samuel G. Green, Gray, Ga., and Robert J. Lennon, East Moline, Ill.

Application September 20, 1937, Serial No. 164,749

2 Claims.

The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to us of any royalty thereon.

The subject of this invention is a wrench.

The purposes of the invention are to provide a wrench in which an operating handle may be readily moved in opposite directions to close the jaws, in which locking means are not required, and in which the handle and jaws are mutually limiting and supporting.

To these and other ends the invention consists in the construction, arrangement and combina-- tion of elements described hereinafter and pointed out in the claims forming a part of this specification.

A practical embodiment of the invention is illustrated in the accompanying drawing, where- 1n:

Fig. 1 is a plan View, partly broken away, of the improved wrench showing the jaws in open position.

Fig. 2 is a similar view with the jaws in closed position.

Fig. 3 is a view in side elevation of Fig. 1.

Fig. 4 is a detail plan view of one of the jaws.

Fig. 5 is a View in elevation thereof.

Fig. 6 is a plan view of the link.

Fig. '7 is a view in elevation of the link.

Referring to the drawing by characters of reference, the wrench consists of an operating handle 5 provided at its front face 6 with spaced cheeks !-1. A pair of pins 8 and 9 are fixed in the cheeks on the center line of the operating handle, the end pin 8 serving as a coupling pin to mount a pair of jaws A and B on the handle and the pin 9 serving as a cam pin to move the jaws.

The jaws are identical and each one consists of an arcuate arm Ill having a portion ll of reduced thickness provided with an oblong slot l2 for pivotal and sliding mounting on the coupling pin 8. The portions I I enable the jaws to be conveniently crossed and fitted between the cheeks. Each reduced portion II is extended to form a short offset arm l3 and the two arms l3 of the pair of crossed jaws are disposed on opposite sides of the cam pin. The outer ends of the arcuate arms ll! of the jaws are connected by a pivotally attached arcuate link M.

The jaws are in the open position shown in Fig. 1 when the offset arms I3 are drawn together as closely as is permitted by the slots l2 and in this position they are parallel to the handle 5 and in contact with the cam pin 9. The ends of the arms are spaced from the front face 6 of the handle. The jaws are now adapted to be applied to a pipe or gun barrel.

The handle 5. is now moved in the direction that it is desired to turn the pipe as shown in Fig. 2. During such movement of the handle the cam pin acts on the arm l3 which is disposed in its path and in separating the arms I3 the jaws are closed to grip the pipe. In this position the arm [3 which has been acted on by the cam pin engages the face 8 of the handle so that when the pressure applied to the handle to turn the pipe the strain will be removed from the pins 8 and 9. The engagement of the arm and handle mutually limit the closing of the jaws and the closing movement of the handle. During the movement of the handle it is immaterial whether it pivots on the coupling pin 8 as shown in Fig. 2 or on the cam pin 9 as the separation of the arms will occur in either event.

It will be readily apparent from the drawing that the handle functions to close the jaws irrespective of the direction of its movement and that reversal may be quickly accomplished.

We claim:

1. In a wrench, an operating handle having a front end face and spaced cheeks, a coupling pin and a cam pin fixed in the cheeks and disposed along the center line of the handle, a pair of similar hingedly connected jaws, each consisting of an arcuate arm having a reduced portion with a slot for the coupling pin and extended to form an off-set arm, the jaws arranged with their reduced portions crossed between the cheeks and their offset arms on opposite sides of the cam pin,

the ends of said offset arms normally spaced from the front end face of the handle when the jaws are open, said offset arms selectively engageable by the cam pin and selectively engageable with the face of the handle when the handle is moved relatively to the jaws to close the jaws.

2. In a wrench, an operating handle having a front end face and spaced cheeks, a cam pin fixed in the cheeks, a pair of similar hingedly connected jaws having crossed portions between the cheeks, means for pivotally and slidably mounting the crossed portions in the handle, off-set arms on the jaws and disposed on opposite sides of the cam pin, the ends of said arms normally spaced from the front end face of the handle when the jaws are open said arms selectively engageable by the cam pin and selectively engageable with the face of the handle when the handle is moved relatively to the jaws to close the jaws.

SAMUEL G. GREEN. ROBERT J. LENNON. 

